Description of regexEvaluater.pl :
regexEvaluater.pl is a perl Tk script which was basically developed for the interactive testing and improving of regular expressions. It can be used for browsing and filtering of structured data (input separator $/ can be changed) too. It supports highlighting of matching text, export of perl's matching parentheses ($1, $2, ...), viewing of perl vars ($&, $+, ...) clipboard, etc.